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- “Largely unexplored, but apparently quite the vacation resort.”— AI Serina
Upon Human discovery of Arcadia, the planet had no need for terraforming, already inhabited by dense jungles and large oceans. Arcadia was rich in natural resources, and almost no change was made to its geographical features. The UNSC established the largest landmasses into six continents; Eire, Pacifica, Mu, Caledonia, Lemuria and Avalon. Pirth City in Mu, became the largest city on the planet, and soon the capital city.
Arcadia became a center for agriculture, research and recreational activities. It was also home to the Deep Space Research Array. However, despite all of this, Arcadia's population and structures were all very clustered, leaving huge areas of the planet unexplored.
The more wild regions of the planet were also home to Insurrectionist bases. At some point prior to 2526 ODSTs were deployed to the planet to drop onto a stronghold. However, the Insurrectionists were still able to keep a large presence on the planet at least until 2531.
- Main article: Battle of Arcadia
By 2531, it had a population of approximately three million. However, it became a site of conflict in 2531, caught up in the Human-Covenant war, after a Forerunner stellar map on Harvest pointed the Arbiter Ripa 'Moramee towards the colony. Over the course of the battle, the Covenant managed to extract the location of a Shield World, Shield 0459, from the ruins. Eventually, the Covenant were pushed off by the efforts of the crew of the UNSC Spirit of Fire, allowing much of its civilian populace to be evacuated.
- Main article: Fall of Arcadia
The capital city of Pirth would soon become overtaken by nature. Meanwhile, the remaining colonists formed the farming community of Abaskun on the continent of Mu. It would remain a mostly lawless region, but continued to supply the UNSC with supplies. The Covenant would return back to Arcadia later in 2549, glassing it.
It was seen that the UNSC had a small force on the planet as there were also Marines already on the planet. Also, ONI had a facility on the planet, analyzing Forerunner artifacts on the planet. There was one known military base on the planet, Fort Deen.
Arcadia also had its own police force, the Arcadian Patrol. It is unknown where they specifically patrolled and where they were headquartered on the planet.
TopographyEditArcadia was mostly a tropical planet with many, many jungles. There were also beaches on the planet. It was considered a resort world. There were also farms on the planet.
- ONI Base - An ONI facility in Arcadia's jungles.
- Forerunner ruins - A complex of Forerunner ruins near the ONI base.
- Daylam -A city on Arcadia
- Saqsin -A city on Arcadia
These are the people who were born or lived for an extended amount of time, on Arcadia
- It may have been named after the actual Arcadia, a region and city south of Greece in the Peloponnesus.
- Arcadia is also a name for a paradise in Greek mythology, as well as in later fiction.
- The Arcadian Patrol was the main law enforcement force on the planet.
- The original idea for Arcadia was pitched to Joseph Staten by Graeme Devine. Staten liked the idea so much, that he mentioned it in his novel Halo: Contact Harvest. This was explained by Devine in a Halo Wars video.
- Arcadia is the setting for the RISK version of the Halo Wars board game.
- Curiously. Ellen Anders does not at all reflect on that her homeworld is under attack during the first battle.
- In the Halo Encyclopedia, Arcadia is falsely referred to as an Inner Colony on page 286.
- Halo Wars (First appearance)
- Halo Legends
- Risk: Halo Wars
- Halo 4: Forward Unto Dawn (Mentioned only)